Linear alkylbenzene sulfonate (LAS) promotes sedimentation and lipid accumulation in Scenedesmus obliquus

Peng, Qiang; Zhao, Miaomiao; Shen, Guangzhu; Gan, Xinyu; Li, Ming

doi:10.1039/c6ra27664d

Cited by 6 publications

(4 citation statements)

References 31 publications

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“…Fatty acid methyl esters (FAMEs) were analyzed according to the method described by Peng [5]. The extracted dry lipid was completely dissolved by 4 mL of 14% BF 3 -methanol and then kept in a boiled water bath for 15 min.…”

Section: Fatty Acid Composition Analysismentioning

confidence: 99%

“…Microalgae are considered as the potential feedstock for biodiesel production [1], because they have a rapid growth rate [2] and high lipid contents [3]. Scenedesmus obliquus is one of the most widely used lipid-producing microalgae [4,5]. The proportions of C16-C18 and unsaturated fatty acid in the fatty acids produced by Scenedesmus obliquus are both high [6].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Nitrogen Forms and Supply Mode on Lipid Production of Microalga Scenedesmus obliquus

Zhao

Chen

et al. 2020

Energies

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Optimization of the microalgae culture conditions could significantly reduce the production costs of microalgae-derived biodiesel. In the current study, a new process of adding different forms using the multiple small-dose method was employed. The effects of different forms of nitrogen (NaNO3, NH4Cl, and CH4N2O) and their concentrations (0.1, 0.5, 1, and 2 mg L−1) on the growth and lipid production of Scenedesmus obliquus were studied. Algae density and lipid production increased with increasing nitrogen concentration for all different forms of nitrogen except NH4Cl. The Scenedesmus obliquus growth was promoted by adding NaNO3 and CH4N2O, but was inhibited by adding NH4Cl. Adding 2 mg N L−1 of CH4N2O daily yielded the highest cell density (1.7 × 107 cells mL−1) and lipid production (242.4 mg L−1). These conditions can thus maintain the biomass of Scenedesmus obliquus, increase its lipid accumulation, and decrease the costs of biodiesel production.

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Section: Fatty Acid Composition Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Nitrogen Forms and Supply Mode on Lipid Production of Microalga Scenedesmus obliquus

Zhao

Chen

et al. 2020

Energies

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“…Such mechanisms are of interest for microalgal biotechnology as a lower-cost harvesting process [ 168 ]. HS could support the initial formation of the extracellular matrix of polysaccharides and lipids required for colony formation and flocculation [ 169 ], reducing the metabolic costs of colony formation [ 170 ]. The surfactant agents, such as linear alkyl benzene (LAB) [ 171 ], benzalkonium bromide (BZK) [ 172 ], sodium dodecyl sulfate (SDS) [ 172 , 173 ], and nonionic surfactant polyoxyethylene (40) nonylphenol ether (NPE) [ 172 ] enhance microalgae colony formation in the presence of smaller amounts of grazers natural cues or even in their absence [ 171 ].…”

Section: Humic Substances As Microalgae Biostimulantsmentioning

confidence: 99%

Humic Substances as Microalgal Biostimulants—Implications for Microalgal Biotechnology

Popa

Lupu

Constantinescu-Aruxandei

et al. 2022

Marine Drugs

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Humic substances (HS) act as biostimulants for terrestrial photosynthetic organisms. Their effects on plants are related to specific HS features: pH and redox buffering activities, (pseudo)emulsifying and surfactant characteristics, capacity to bind metallic ions and to encapsulate labile hydrophobic molecules, ability to adsorb to the wall structures of cells. The specific properties of HS result from the complexity of their supramolecular structure. This structure is more dynamic in aqueous solutions/suspensions than in soil, which enhances the specific characteristics of HS. Therefore, HS effects on microalgae are more pronounced than on terrestrial plants. The reported HS effects on microalgae include increased ionic nutrient availability, improved protection against abiotic stress, including against various chemical pollutants and ionic species of potentially toxic elements, higher accumulation of value-added ingredients, and enhanced bio-flocculation. These HS effects are similar to those on terrestrial plants and could be considered microalgal biostimulant effects. Such biostimulant effects are underutilized in current microalgal biotechnology. This review presents knowledge related to interactions between microalgae and humic substances and analyzes the potential of HS to enhance the productivity and profitability of microalgal biotechnology.

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“…Analysis of fatty acid composition Fatty acid methyl esters (FAMEs) were analyzed according to the method described by Peng et al (2017). The dried lipid extracted was completely dissolved in 4 mL of 14% BF 3methanol and then placed in a bath of boiling water for 15 min.…”

Section: Analysis Of Cell Densitymentioning

confidence: 99%

Recommended turbulent energy dissipation rate for biomass and lipid production of Scenedesmus obliquus in an aerated photosynthetic culture system

Yang

et al. 2020

Environ Sci Pollut Res

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Effects of turbulent energy dissipation rate (increased from 1.28 × 10 −6 to 1.67 × 10 −5 m 2 s −3) on Scenedesmus obliquus biomass and lipid accumulation at different aeration rates (0.3, 0.6, 0.9, 1.2, and 1.5 L min −1) were investigated. The turbulent energy dissipation rate was calculated by CFD model simulation. When the turbulent energy dissipation rate increased to 7.30 × 10 −6 m 2 s −3 , the biomass and lipid productivity increased gradually, and finally reached their maximum values of 1.11 × 10 7 cells mL −1 and 16.0 mg L −1 day −1 , respectively. When it exceeded 7.30 × 10 −6 m 2 s −3 , the biomass and lipid productivity showed a decreasing trend. Therefore, the most favorable turbulent energy dissipation rate for S. obliquus growth and lipid accumulation was 7.30 × 10 −6 m 2 s −3 .

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Linear alkylbenzene sulfonate (LAS) promotes sedimentation and lipid accumulation in Scenedesmus obliquus

Abstract: Linear alkylbenzene sulfonate promotes sedimentation by inducing colony formation of Scenedesmus obliquus. It also promotes lipid accumulation in S. obliquus.

Cited by 6 publications

References 31 publications

Effects of Nitrogen Forms and Supply Mode on Lipid Production of Microalga Scenedesmus obliquus

Effects of Nitrogen Forms and Supply Mode on Lipid Production of Microalga Scenedesmus obliquus

Humic Substances as Microalgal Biostimulants—Implications for Microalgal Biotechnology

Recommended turbulent energy dissipation rate for biomass and lipid production of Scenedesmus obliquus in an aerated photosynthetic culture system

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